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【单选题】
已知级数 在 处发散,则其在 处A.
绝对收敛
B.
条件收敛
C.
发散
D.
无法判断其敛散性
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【单选题】【单选】Whistle signals indicating course changes must be sounded ______.
A.
in fog
B.
when vessels are in sight of one another
C.
when you can be reasonably sure of hearing the other vessel’s acknowledgement
D.
every time you alter course
【单选题】29在装配图中,若螺旋弹簧的簧丝直径___≤2mm时,其剖面可用___表示,或采用示意画法。
A.
在图形上/涂黑
B.
在图形上/夸大
C.
的实际数值/涂黑
D.
的实际数值/空白
【简答题】In one way of thinking, failure is a part of life. In another way, failure may be a way towards success. The “spider story” is often told. Robert Bruce, leader of the Scots in the 13th century, was hi...
【单选题】It is famous for its _________in helping homeless people return to a normal life .
A.
succeed
B.
success
C.
successful
【多选题】党对公安工作绝对领导的必要性包括( )
A.
公安机关是人民民主专政的工具．关系着国家安全和社会稳定，只有在党的正确领导下才能正确发挥其职能作用
B.
公安机关有法律赋予的权力和强大实力。坚持党的领导才能保证其正确运用
C.
公安工作要处理社会矛盾中最具有对抗性、隐蔽性和腐蚀性的问题，坚持党的领导才能使公安机关加强战斗力和保持纯洁性
D.
公安工作具有广泛的社会性，需要党组织去动员、组织和协调各方面的力量
【单选题】When whistle signals are used for launching lifeboats，one short blast means（）.
A.
use the float-free method only
B.
lower all boats
C.
raise all boats
D.
drill is over，secure all boats
【单选题】Under which of the following circumstances should a vessel indicate,by whistle,signals that its engines are going astern? ________. 1 On visually sighting another vessel.2 On hearing the fog signal of...
A.
① only
B.
② only
C.
Both ① and ②
D.
Neither ① nor ②
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